They are not compatible. Shimano shifters pull a different amount of (twice as much or half as much, I don't remember) cable per click than Sram shifters (unless you get the Sram shifters that are Shimano compatible). If you use them together, the indexing will be all wrong.

They are not compatible. Shimano shifters pull a different amount of (twice as much or half as much, I don't remember) cable per click than Sram shifters (unless you get the Sram shifters that are Shimano compatible). If you use them together, the indexing will be all wrong.

yeah, and besides the compatibility issues with the rear, don't count on a sram front working with sti road front shifter even to it's compatible with shimnao front mtb shifter.